2021 BMW M4 technical service bulletins
72 technical service bulletins and manufacturer communications cover the 2021 BMW M4.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- While driving on a smooth and/or unevenroad, a “cracking” sound is heard from therear wheel arch area...
- While driving on a smooth and/or uneven road, a “cracking” sound is heard from the rear wheel arch area...
- An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in...
- The electrical system of BMW vehicles has been subject to an ongoing development process over the last few...
- With the vehicle is on a lift and the front struts are in the extended position, there may be a cracking...
- At low outside temperatures (below 40 degrees F) and slow driving speeds (i.e. when parking,...
- The Central Information Display goes black intermittently due to resets of the Head Unit (HU-H3)....
- Customer states one of the front seats is inoperative
- Functional noises (squealing/honking) when braking shortly before the vehicle comes to a stop
- BMW AG has issued a Delivery Stop effective June 6, 2023 on certain Model Year 2023
- A vehicle arrives at your center to be diagnosed for a micro-leak in the fuel evaporative (EVAP) system...
- Condensation is present on the inner surfaces in one or both taillights (circled).
- Headlight check control (CC) message 128 "High beam headlight failure" is displayed
- Sudden failure of the power window(s).
- Upon opening and closing the tailgate, a creaking/groaning sound can be heard from tailgate actuator.
- When turning the steering wheel while stationary or when driving on uneven roads; cracking, creaking, or...
- In SPORT mode, a black square appears in the RPM gauge (tachometer) section of the instrument cluster display.
- Customer states there is no audio playback (telephony, navigation, radio) and system sounds (PDC, turn...
- Customer is shown an incorrect GPS location in the vehicle (i.e., Nav Map, coordinates).
- A turbine-like noise can be heard from the rear axle while deceleration during the first 300 miles of...
- Customer is unable to power up or charge accessories through a plug adapter inserted in the front 12-volt...
- The charge air cooler housing may sperate and lose charging pressure.
- Hood lever is pulled twice but the hood only achieves the pre-latch position on both sides.
- Due to a software error, Remote Software Upgrade (RSU) and Remote Support are currently not possible
- A check control message for the restraint system appears
- After opening the vehicle with the radio remote control and changing the profile, the exterior mirror...
- The customer complains that the radio stations change by themselves.
- An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in...
- Vehicle cannot be opened or closed using comfort access, engine start is not possible, and the vehicle may...
- During strong acceleration, the fuel filler door possibly opens automatically.
- The sound output intermittently drops out entirely
- Vehicle cannot be opened or closed using comfort access, engine start is not possible, and the vehicle may...
- Excessive condensation has collected in one or both headlights.
- Mist formation on the windshield inside surface may occur at departure or after MSA (automaticstart/stop)
- The Headunit High (HU-H), also called NBT, began replacing the Car Information Computer (CIC) on certain...
- The trunk floor carpet is wet, primarily on the left side.
- In some rare cases a customer vehicle might be excluded from one or more Remote Software Upgrade(RSU)...
- Cracking noises heard from the area of the front axle when rotating the steering while stationary or at...
- SiriusXM satellite radio is not working and does not display a channel list.
- The SIM card installed in the telematics control unit (ATM2) connects to different mobile providers' networks
- While using the wireless charger, one or both of the following may occur: 1) The BMW display key or mobile...
- Customer states the following about their vehicle: active radio or music source is interrupted, the...
- It is possible that the EPP (expanded polypropylene) insert for the lithium-ion battery was not installed...
- The "energy management" Check control message (ID code 415) is falsely displayed when entering the vehicle.
- A turbine-like noise can be heard from the rear axle while deceleration during the first 300 miles of...
- Inform the customer during a consultation that the M Compound (standard equipment) and M Carbon Ceramic...
- Vehicle cannot be opened or closed using comfort access, engine start is not possible, and the vehicle...
- Noises from the center console shifter cover at low speeds
- The BMW key card cannot be activated
- The customer may complain of a check control message stating "Safe share detected" (CCM-ID 953)
- The cigarette lighter is difficult or impossible to pull it out.
- When the vehicle is operated in Sport Mode, the engine speed is no longer displayed in the BMW Head-Up...
- When starting the vehicle vehicle at standstill, various yellow Check Control Messages CCMs appear
- Due to an software error, the adaptation values of the actuator contiguous wheel slip limitation (ARB) may...
- Check badge on tailgate, replace if necessary .
- Roof trim strip loose at rear
- HU-H3 mgu resets due to bluetooth connection with samsung android 11
- Remote control is not detected
- Increased effort required to open doors
- Retrofit satellite radio (option code SA655)
- Streaks on front side windows
- Condensation in taillight
- Bmw maintenance booklet and OEM tire manufacturers' warranties
- Remote control is not detected
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